The third grade of college entrance examination, the third grade of college entrance examination in some provinces. The first file 1A institutions refer to key institutions, and there are no B-level institutions in the first file. The second grade 2A colleges are ordinary undergraduate colleges, while the second grade 2B mainly refers to private universities and independent colleges (actually a private university affiliated to a public college); 3A institutions in the third file are public institutions, while 3B institutions in the third file are mainly private institutions.

So it's also a university, just a college subject. As for 1, it is an undergraduate course.